Geologic Time Scale
Authored by Kerri Roslow
Science
9th Grade
Used 4+ times
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16 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which lettered dot best indicates the geologic time when humans first appeared on Earth?
A) A
B) B
C) C
D) D
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
What is the approximate percentage of geologic time that humans have existed on Earth since its origin?
less than 1 %
1.8%
11.8%
more than 25%
3.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Geologic history is divided into eras, periods, and epochs based on the
type of rock deposited at different times throughout history
half-life of radioactive isotopes found in rocks
inferred movements of Earth's landmasses
fossil evidence found in bedrock
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Approximately 2.2 billion years ago, which gas was first added in large amounts to Earth's atmosphere from life-forms that evolved in the oceans?
carbon dioxide
water vapor
oxygen
nitrogen
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which sequence shows the correct order of Earth’s geologic time intervals from oldest to youngest?
Archean → Mesozoic → Cenozoic → Paleozoic → Proterozoic
Archean → Proterozoic → Paleozoic → Mesozoic → Cenozoic
Cenozoic → Mesozoic → Paleozoic → Proterozoic → Archean
Cenozoic → Paleozoic → Archean → Mesozoic → Proterozoic
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which event occurred earliest in geologic history?
appearance of the earliest grasses
appearance of the earliest birds
the Grenville Orogeny
the intrusion of the Palisades Sill
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What is the estimated age of Earth?
4.6 × 10⁶ years
4.6 × 10⁷ years
4.6 × 10⁸ years
4.6 × 10⁹ years
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